Distributed audio signal processing system having logical channel groups
Active Publication Date: 2009-12-10
POLYCOM INC
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[0007]Disclosed is a signal processing system having two or more signal processing units all of which are connected together by a communications link. The signal processing units operate to receive at least one pre-processed input signal over any of at least one physical input channels included on any one of the signal processing units, switch the pre-processed input signal from the physical input channel to any of a plurality of physical output channels included on the signal processing unit according to a pre-defined control command, and to route the pre-processed input signal to any one of a plurality of output devices connected to the physical output channel. Each of the plurality of linked signal processing units can include a physical ch
Problems solved by technology
But typically such signal mixing units do not include any complex signal processing functionality such as acoustic echo cancellation for instance.
Commercially available audio mixing units are limited to mixing a finite number of audio signals.
The audio signal mixing is usually limited by the scale / capability of the switching matrix associated with the unit.
A disadvantage in linking two or more audio signal mixers together is that the process of setting up the signal mixing assignments can become burdensome and error prone.
Assigning mixes to input signals in such a non-global manner can be tedious at best and at worse is prone to assignment errors.
As with discrete signal mixing and signal processing units, integrated mixing and processing units are limited as to input signal mixing and processing capability.
These user interfaces do not provide any facility for abstracting the actual, physical audio input signals over the entire conferencing system that will allow a user to easily assign or reassign mixes to the audio signals or to easily assign particular signal processing methods to different signals or groups of signals across the entire multi-unit system.
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[0013]Described herein a multimedia signal processing system, of which one type is an audio conferencing system (sometimes referred to as a teleconferencing system). However, the disclosed methods and systems can be easily implemented in a video conferencing system or employed to simply mix audio signals without any conferencing application by a skilled audio engineer. Referring now to FIG. 1, a signal processing unit labeled signal processing unit 10 is shown that includes a number of audio signal inputs 13A, 13B, and 13C, an input signal processing function 12, and output signal processing function 14, a number of audio signal outputs 15A, 15B, and 15C, a matrix processor 11 and a hi-bandwidth link 22. The audio signal inputs 13A, 13B and 13C can be a signal from a microphone, a telephone signal, an audio signal from a videoconference unit or any other type of input signal received by unit 10. An audio conferencing unit such as unit 10 typically supports a number of signal inputs ...
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A distributed audio signal processing system having a plurality of linked audio signal processing units is disclosed. Each audio signal processing unit has physical channels for receiving and sending local audio signals and a high bandwidth interface for exchanging audio signals with other linked audio signal processing units. Each of the physical channels of each of the audio signal processing units is mapped to a corresponding global channel. Global channels can be combined to form virtual channels that can be processed as a signal channel. Combinations of virtual channels can be grouped into logical channel groups that can be controlled as a group.
Description
FIELD OF THE INVENTION[0001]The disclosure relates generally to the area of audio signal mixing and processing and specifically to distributing the processing and mixing of audio signals among a plurality of linked audio signal processing units.RELATED CASES[0002]Reference is made to related patent applications entitled “Distributed Audio Signal Processing System” and “Distributed Audio Signal Processing System Having Virtual Channels,” which have the same filing date and inventorship as the instant application and which are incorporated by reference.BACKGROUND[0003]Audio signal mixing and audio signal processing functionality is typically included in various types of audio mixing units, audio conferencing and video conferencing systems. Audio signal mixing can involve receiving a plurality of audio signals over an audio input from a microphone, for instance mixing two or more of these audio signals together and then routing the mixed audio signal(s) to one or more audio outputs, su...
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CPCH04M3/56H04L12/1827
InventorJOINER, JAMES STEVENPOCINO, MICHAEL AUGUSTORANGIO, SCOTT DAVID
OwnerPOLYCOM INC